Telegraph transmitter



Sept 3, 1940- A. H. REBER 2,213,475

TELEGRAPH TRANSMITTER INVENTOR. ALBERT H. RElBER A. H. REIBER 4 l2,213,475

TELEGRAPH TRANSMITTER Filed .July 1a, 19:58 3 sheets-sheet 2 FIGS.

INVENTOR. ALBERT H. REIBER A ORNEY.

Sept. 3, 1940. A. H. REBER I E D i INVENTOR. ALBERT H. Rx-:lsER 79 BY|55 AT ORNEY.

Patented Sept. 3, 1940 UNrrEo STATES '2,213,475 TELEGRAPH TRANSMITTERAlbert Hf Reiber, Evanston, Ill., assignor to Teletype Corporation,Chicago, Ill., a corporation of Delaware Application July 18, 1938,Serial No.219,7 "11 21 Claims.

This invention relates to printing 'telegraph apparatus and moreparticularly to telegraph transmitters for the transmission of characteridentifying signals. l

Transmission of vcharacter identifying signals in telegraph systems isfrequently achieved in accordance with a control strip'including controlindicia formed in varying combinations either by manually or remotelyoperated apparatus. Specifically, the control indicia may be in the formof transverse rows of perforations formed in a tape either b-y akeyboard perforator or by a signal controlled perforator which iscommonly referred to as a reperforator. The tape thus prepared passesthrough a transmitter or sensing `mechanism to control correspondinglythe transmission in succession of impulses videntied with theperforations, which has its tape entrance channel separated from thetape exit channel of the perforator with the result that a 'short lengthof tape extends between the perforator and transmitter and contains agroup of periorations, for the last character perforated is not sensedunless instrumentalities are provided for advancing the tape to presentsuch group of perfol-ations to the transmitter. Prior to thetransmis-sion of signals for the succeeding groups of perforations,blank tape represented by the distance between the perforator and thetransmitter is passed through the transmitter and line time commensuratewith said length of blank tape is consumed, with the consequenttransmission of no intelligence.

An object of the invention is the provision of a telegraph signaltransmittingy :apparatus to obviate diiculties previously encounteredand to make possible the sensing of the last control indicia on thecontrol strip without requiring the further advancement of the strip.

Another object of the invention is the provision of a unitary tapesensing mechanism and distributor which is extremely simple and verycompact.

The above and other objects of the invention' ranged to set permutably aplurality of bars which set correspondingly a plurality of vinterponentsto control, Vupon the operation of a mechanically operated punch hammer,the operation of punches arranged in a transverse row to perforate acontrol strip in'accordance with the code allocated to a depressed keylever. Cooplerating withy the code punches is a feed hole kpunch forinserting in the tape a feed hole which cooperates with a tape feedingmechanism of the sensing unit to advance the tape therethrough step bystep in order that the groups of perforations therein will be sensedsuccessively.

' The tape sensing mechanism includes, as previously outlined, thesensing fingers which are mounted lin a carrier capable of oscillationabout a xedpivot away from and toward the exit tape channel ofthekeyboard periorator. Normally, thel tape entrance'channel of thesensing unit is immediately adjacent the exit channel-of the perforatorand the tape passes directly from the perforator to the sensing unit andWithout any eX- posed portion of the tape. When the perforator isoperated, the tape feed mechanism thereof advances the tape andmoves'the sensing unit about its pivot a distance equal to the distancebetween the transverse rows of perforations. The sensing unit, throughthe sensing lingers, then senses the transverse row of perforations andcontrols through appropriate levers the operative position of a contactoperating member individual thereto for effecting, upon the operation ofa cam distributor, the transmission of impulses corresponding to thesetting of the sensing lingers. f

The sensing unit operates at a definite predetermined speed, whereas'the perforator may be operated at a speed dependent upon the speed ofthe operator. If the perforator is operated at a speed'higher than thespeed of rotation-of the transmitting cam shaft, 'the tape will be fedat a rate higher than the rate at which it is consumed by the sensingunit, in which case the sensing unit will be pushed in acounterclockwise direction about its pivot until it reaches apredetermined position when, if the perforator is continued to beoperated at a speed higher than the speed of operation of thetransmitting cam shaft, thetape will be formed in a loop extendingbetween the sensing unit and the perforator.

WhenA a cessation in the operation of the perforator occurs, the tapewill continue to be ad- Vancedthrough the sensing unit by the tapeadvancing mechanism thereof. When the loop of tape has been exhaustedand the tape becomes taut between the sensing unit and the perforator,and provided operation of the perforator is not resumed, the sensingunit, due to the cyclic operation of the tape advancing mechanism andits cooperation with the feed holes in the tape, will be moved in aclockwise direction toward the perforator and in such movement, which isstep by step, the transverse rows of perforations will be sensedsuccessively until the sensing head is brought in abutting relation tothe perforator when mechanism is operated for discontinuing theoperation of the tape advancing mechanism through arresting the rotationof the transmitting distributor cam drum.

Immediately that operation of the perforator is resumed, the tape willbe advanced thereby and the sensing unit will bemoved about its pivot topermit its sensing fingers to sense the transverse row of perforationstherein. y

A better understanding of the invention may be had from the followingdescription, taken in conjunction with the accompanying drawings,wherein Fig. 1 is a front elevational view of structure embodying thepresent invention;

Fig. 2 is another view of a part of the structure disclosed in Fig. 1but showing the sensing unit displaced from the perforator;

Fig. 3 is a partial plan view of the essential elements of a keyboardperforator, tape sensing unit, `and a signal transmitting device;

Fig. 4 is an end elevationalview of the structure disclosed in Fig. 3;

Fig. 5 is a sectional view taken substantially along the line 5-5 ofFig. 3;

Fig. 6 is a detail view of the tape holding mechanism of the sensingunit;

Fig. '7 shows a modification of the sensing unit associated with theperforator; and

Fig. 8 is a circuit diagram of the electrical connections for theapparatus disclosed in Fig. 3.

The present invention may be considered as including three principalunits, a tape perforator 9, a tape sensing unit I9, and a transmittingunit I I (Fig. 3.) Each of the several units is mounted on a basecasting I2.

The perforator shown (Figs. 1 and 5) comprises a set of punches I3movable through openings in upper and lower guide plates I4 and I5 andcooperating with a die plate I6, the plates I4 and I6 being spaced apartto form a tape guide. Ihe punches I3 are selectively operated by anactuating member or hammer I1 and a set of permutation bars orinterponents I8 corresponding in number to the number of punches I3.

The hammer I1 is arranged to oscillate about a pivot I9 and is operatedby arm 20 secured to one end of a lever 2I whichis pivoted on Arod 25journaled in ears or projections 28 and 29 formed on the outer edge of avertical wall 39 of a casting. Lever 2I carries at its opposite end acam roller 32 which cooperates with a cam to operate cyclically hammerI'I and eect its oscillation and correspondingly the operation of therpunch pins I3.

As disclosed in Fig. 1, a sleeve 33 having a pin 34 is adjustablymounted on arm 20. Pin 34 extends loosely through an aperture in hammerI1.

Mounted oppositely to arm 20 is a second arm 36 which, like arm 20,carries an'adjustable sleeve 31 which has an elongated pin 38 inalignment with ra punch pin 39. Punch pin 39 is partially enclosed in ahousing 49 which conceals a spring 4I arranged to subject punch 39 tospring tension and restore it to its normal position. Punch 39 is guidedat its upper and lower extremities by guide plates and cooperates with adie plate 42` which is separ'ated from the upper guide plate to form atape guide. Punch 39 serves to apply to tape 43 the feed holes inadvance of the application of the code perforations by code punches I3.It is thus seen that for each operation of lever 2 I, the hammer I1 willbe oscillated about its pivot I9 and the feed hole punch 39 will bemoved upwardly by pin 38 which extends through an aperture in hammer I1to perforate the feed hole, and will be restored to the position shownin Fig. 1 by spring 4I following the restoration of lever 2l to theposition shown in Fig. 1.

The interponents or permutation elements I8 are movable back and forthover the face of hammer I1 and are adapted to be positioned in differentcombinations with their outer ends either in operative positions beneaththe corresponding punches I3 or in inoperative positions out ofalignment with'punches I3.

The free end of hammer I1 is upturned, which portion is slotted to formguide channels for the forward end of each of the interponents I8.

Upon each setting of the interponents I8, lever ZI is oscillated andhammer I1 is moved about its pivot to form a row of perforations in tape43 through the actuation of punches I3 corresponding to the setting ofthe interponents I8. Also, upon the operation of arm 2I, pin 38 will beactuated and feed hole punch 39 will be operated to perforate the feedhole in tape 43 in advance of the formation of the row of codeperforations.

Withdrawal of the feed hole punch is achieved by spring 4I, whereas thewithdrawal of the code punches is accomplished by a stripper bail 44which is pivoted at 45 and which has` secured thereto oneend of raretractile spring 46. As disclosed, the punch pins I3 are each pr'ovidedwith a shoulder which cooperates with the lower surface of springactuated stripper bail 44 so that when the punches I3 are raised,stripper bail 44 Will be moved about its pivot 45 against the action ofspring 46 and Without any binding action on the punches I3. When hammerI1 is returning to the position shown in Fig. 1, spring 46 is effectiveto withdraw the actuated punches I 3 and restore them to their normalunactuated position.

As previously described, for each operation of lever ZI', punch 39 isoperated to form a feed hole adapted to be engaged by the pin teeth of afeed drum 41. The latter is provided with ratchet teeth 48 to be engagedby a feed pawl 49 which is pivotally mounted to hammer I1 and which isthus reciprocated upon each operation of the latter. A star Wheel 50 anda knurled portion 5I which facilitates manual rotation .are integrallyformed and are secured to feed drum 41 by means of a nut. Formed on theoutside of a bearing sleeve through which drum 41 passes is a disc 52provided with a projection 53 arranged to cooperate with an .arm 54formed on feed pawl 49 and arranged with an arm 55 cooperating with aslot formed in a member 56 which is capable of being depressed to causethe withdrawal of feed pawl 49 from cooperation with teeth 48 and toback step the feed drum 41 to present a previously perforated row ofperforations in alignment with the code punches I3. A spring tensionedlever 51 pivoted on member 56 cooperates with star wheel 50 to backspace the feed drum 41 and in turn the tape 43.

A spring 6I connected to the lower extremity Of feed pawl 49 serves tohold the feed pawl in l'IIS i engagement with ratchet teeth 48 of thefeed drum and also normally holds the hammer I1 against the adjustablesleeve 33. When hammer |1 is moved in a clockwise direction by theaction of lever 2|, spring 6| is extended. Consequently, when the forceon lever 2| is relieved, the energy stored in spring 6| is releasedV andhammer |1 is restored to the position shown in- Fig. 1. Feed pawl'49will also be restored and in being so moved, will rotate feed drum'41 toadvance the tape 43 to present a succeeding area thereof in alignmentwith the code punches I3. It is thus seen that for each operationofhammer I1, feed drum 41 will be rotated and the tape 43 will be advancedstep by step.

The interponents or permutation elements I6 are set in differentcombinations by a plurality of key levers 62 suitably mounted on a pivotrod and normally upheld in raised position by individual springs, thelevers being provided at their forward ends with key tops 63.

Beneath the key levers extend a number of pairs of code bars, and sincein the form shown there are ve interponents I8, a corresponding numberof pairs of code bars are employed. Each pair comprises a bar 64 and 65and each pair of bars is supported adjacent to eachend by a rock arm 66.Each bar hasits endsguided by oppositely disposed guide combs 58. Theserock arms are pivotally mounted on a shaft 61 secured to a block 69which extends vtransversely of the bars 64 and 65 and which is arrangedwith a plurality of slots, one for each rock arm 66. A similar block 69(not shown) is positioned adjacent the right-hand end of bars 64 and 65,as viewed in Fig. 1, which, too, carries a shaft 61 constituting a pivotfor correspondingly shaped rock arms and which also serves to limit theendwise movement of bars 64 and 65. One pair of rock arms is interposedbetween each two code bars comprising a pair, and the bars are held inproper spaced relation by the guide combs, one of which is shown at 58.The rock arms 66 are subtsantially T-shaped or widened at their upperends and are provided with offset lugs on opposite sides of and spacedsome distance from the shaft 61. One of the lugs of each arm projectsforwardly into a notch on the lower edge of the corresponding code bar64 and its other lug projects rearwardly beneath the lower edge of thecorresponding code bar 65. With this arrangement, the depression ofeither bar of a pair of code bars rocks the arms and lifts the othercode bar.

Each pair of rock arms 66 is pivoted to a longitudinally movablepermutation bar 68. rIn the form disclosed, each bar 68 is connected toits in dividual lever 69, which is pivotally mounted on shaft 10 andwhich has its upper end connected to its interponent I8; that is,individual to each bar 68 and its companion interponent I 8 is a lever69, so that for each movement of bar 68, corresponding movement ofinterponent I8 results.

Cooperating with the upper ends of levers 69, which are beveled, is arod or roller 1I secured to a U-shaped member 12 pivoted on rod 13 andurged into cooperation with the beveled end of each of the levers 69 bya spring 14. Rod 1I serves as a detent for levers 69.

Each of the key levers 62 which extends across the code bars 64--65 isarranged, when operated, to engage and depress one of thecode-bars ofeach pair and thereby set the same and the permutation bars 68 andinterponents I8 in a characteristic combination. the punches I3 will beoperated in the same characteristic combination upon the operation ofhammer I 1 through lever 2|.

For effecting the operation of the punches I3 through the interponentsI8, each key lever 62 is arranged to depress a universal bar 15'which isslidably mounted in the same manner as the code bars 64-65 and alsocooperates withA a pair of rock arms secured to a connecting link l16 tooperate a bail 11 which constitutes a part of the release mechanismeffective for controlling the application of power to lever ZI. Asdisclosed in Fig. 5, one arm of bail 11 engages an adjusting screw 18fixed in one end of pivoted arm 19 y to rotate, when the connecting link16 is shifted,

arm 19 and remove the stop projection from the path of spring operatedlatch and allow yapplication of power to the cam for operating lever 2|.The form of the release mechanism may correspond to that disclosed inPatent No.

2,019,505 to A. H. Reiber of November 5, 1935,

and consequently reference is made to such patent for a full andcomplete understanding of the construction and operation of the releasemechanism which is operated by the universal bar upon the depression ofany of the key levers 62.

As disclosed in Fig. 3, an electric motor 88 has on its shaft a gear 89which meshesl with a gear 99 secured to a shaft 9| journaled in bearings92 and 93. Also secured to shaft 9| is a gear 94 and the driving portionof a friction and positive clutch 95. tive clutch 95 a sleeve 96 onshaft 9| is rotated. Secured to sleeve 96 is a cam 91 which cooperateswith roller 32 mounted on one arm of lever 2|.

Upon the depression of any of the keylevers 62, the code bars 64-'65will be operated as will the universal bar 15 to effect the operation ofthe clutch release mechanism. Upon the oper'- ation of such mechanism,clutch 95 is effective, whereupon power is communicated to sleeve 96 andthus to cam 91. As cam 91 rotates, lever 2| v is operated to actuatehammer |1 against the action of spring 6|. vIt is thus seen that, foreach operation of a key lever, the code bars 64,-65 will be set in acharacteristic combination, that the interponents I8 will becorrespondingly set, that the clutch 95 will be effective and power willbe applied to cam 91, and that through cam 91 the hammer I1 will bemoved in a clockwise direction, as viewed in Fig. 1, to cause codepunches I3 to perforate the tape and punch 39 to perforate the feedhole, following which the hammer I1 is restored to its normal positionby the action of spring 6|, which serves also to ad-l vance the feeddrum 41 through the operation of feed pawl 49 to advance tape 43 topresent the succeeding area thereof in alignment with punches `I3.

Between feed drum 41 and the entrance end of the tape guide formedbetween the plates I4 and 4I6 is a member 98 which has its upper surfacecurved to direct the tape from the feed wheel tothe entrance of the tapeguide in coop- Correspondingly,

Through the friction and posi-v eration with a wire loop 99 formed tocorrespond The sensing unit 'Ihe sensing unit I0 includes two separateframes indicated generally by the numerals |05 and |06. Each of theseframes is mounted on pivots such as |01 and is capable of beingrotatedon said pivots.

'I'he carrier |05, as disclosed in Fig. 1, nor.- kmally abuts the platesI4 and I6 of the perforator and has its entrance channel for theperforated tape in alignment with the exit end of the tape guide formedbetween plates I4 and |6 and formed by the separation of plates |08 and|09. Plates |08 and |09 are apertured to receive the reduced portion ofa sensing pin such as ||0. Inasmuch as there are ve code punches I3,there will be a corresponding number of sensing fingers l; that is,there will be a sensing linger ||0 for each of the possible perforationsappearing in a transverse row of perforations. The separation betweenthe code punches I3 and the apertures in the plates |08 and |09 when theplates |08 and |09 abut the plates I4 and I6 corresponds to the normalspacing between successive transverse rows of perforations in tape 43.Usually the transverse rows of perforations are one-tenth of an inchapart and therefore the punches I3 and the apertures in plates |08 and|09 are correspondingly separated.

As disclosed in Fig. 4, the frame includes, in addition to the plates|08 and |09, side members and ||2. These members are pivotally mountedon pivots |01.

Secured to side members and ||2 are L- shaped members ||3 and ||4,respectively. These members cooperate with portions of rod ||5 whichextends beyond the members and ||2 and to which one end of springs ||6and ||1 are secured and which, as subsequently described, is fastened toside members |40 and |4|. The opposite ends of springs ||6 and ||1 aresecured to spring posts ||B and ||9, respectively, which are secured tomembers and ||2, respectively.

The springs ||6 and |1 serve to maintain the frame |05 normally underspring tension and tend yto rotate the frame |05 in a clockwisedirection, as viewed in Figs. land 2.

Plate |09 is apertured to receive the end which is serrated, as shown inFig. 6, of a rod |25 which is operated cyclically and which serves togrip the tape 43 and hold it against movement during the period thefingers I0 are sensing the perforations in the tape 43.

Mounted on shaft |26 are a plurality of bell crank levers |21, |28, |29,|30, |3I, and |32. These bell crank levers are individual to a sensingfinger I0, except bell crank` lever |30, which isI individual to rod|25. As disclosed, the sensing ngers ||0 are pivotally secured to onearm of their respective bell crank lever on a center line substantiallycoincident with pivot |01, which have an extension cooperating with aguide comb |33. Fastened to the other arm of the bell crank lever is aspring |34 which serves to rotate its bell crank lever in acounterclockwise direction, as viewed in Fig. l, and to move its sensingfinger ||0 vertically to sense the perforations in tape 43. If aperforation appears opposite a sensing finger ||0, it moves to itsfullest extent,` whereas if there is noperforation in alignmenttherewith, its movement is correspondingly restricted.

' Common to all of the bell cranklevers and cooperating with an armthereof is a bail |31 pivoted at |38 and carrying on an extension a camroller.

"and another rear side plate (not shown).

|39. Bail |31 cooperates cyclically with the bell crank levers |21-l32to rotate the bell crank levers about their pivot |26 in a clockwisedirection to withdraw sensing fingers ||0 and tape finger |25 free oftape 43. The manner in which bail |31 is operated will be subsequentlydescribed.

The frame |06 includes side members |40 and |4|, a cross piece |42, anda rotatable rod |43. Side members |40 and |4| are pivoted on pivots |01about which frame `|05 rotates.

Rod |43 carries a ratchet wheel |44 and a pin wheel |45 which cooperateswith the feed hole perforations in tape 43 to advance the tape throughthe sensing unit step by step. Step-bystep rotation of pin wheel |45isaccomplished through the cyclic operation of feed pawl |46 whichcooperates with the teeth of ratchet wheel |44 to cause its step-by-stepadvancement. A detent |41 secured to side member |4| and to which aspring |48 is secured, serves to hold the pin wheel in its advancedposition.

As vdisclosed in Fig. 4, the lower end of stepping pawl |46 is securedto an arm of a lever |49 pivoted on stub shaft |50 and provided with acam roller |5|. Pivoted on a rod |52 and tensioned against the pin wheel|45 is a tape nger |53 (Fig. 2).

The transmitting unit Individual to each of the bell crank levers |21,|28, |29, |3|, and |32 is a bell crank lever |54 pivoted on shaft |55and held in proper position by `spacing washers on shaft |55 and by aguide comb |56 which also has an extension cooperating with the lowerarms of bell crank levers |21, |28, |29, Isl, and |32 to @sect theirproper position.

Each bell crank lever 54 has a hook |51 at its upper end which engagesthe insulated upper end of a spring contact |58 and each of the lattercooperates with a contact finger |59, the

pairs of contact fingers being mounted upon but insulated from asupporting bar |60 carried by the base casting. Each spring contact |58tends to engage its associated contact finger |59 and also serves tohold a lug |6| on the horizontal arm of the corresponding bell cranklever |54 in engagement with the surface of a cam |62, the latterforming a part of a cam sleeve |65 sleeved on a horizontal shaft 63 andextending over the horizontal arms of the bell crank levers |54. The cam|62 is provided with a helical series of slots which, as the cam isrotated, successively pass over the lugsl |6| of the bell crank levers|54. As the corresponding recess passes over one of the lugs, theassociated switch contacts |58- |59 are closed, provided the horizontalarm of the bell crank lever |54 is not restricted in its movement.

The shaft |63 is journaled in a side plate |64 On the sleeve |65carrying cam |62 is a shoulder or cam |66, and the sleeve is splined toa driven portion |61 which constitutes a part of a positive clutchthrough which power is communicated to the sleeve |65. The drivenportion |61 of the clutch has integrally formed therewith a cam surface|68 which cooperates with an extending portion of a bail or clutchthrowout lever |69 pivoted at |16, and functions as a disengaging means.A lateral projection of bail |69 cooperates with the armature of anelectromagnet which, when energized, withdraws the horizontal projection|11 of bail |69 free of the cam is mounted a .gear |13, the latter beingmeshed with a gear 94 and driven continuously from power supplied bymotor 88. Normally, of course, spring |1| tends to move driven portion|61 into cooperation with driving portion |12 of the positive clutch,but is prevented from such motion due to the coo-peration of thehorizontally extending portion of bell crank lever |69 with theprojection of cam surface |68. Consequently, the

transmitting cam sleeve |65 which carries the y cams |62 is normallyheld against rotation by the stop member or bell crank lever |69, whichis held in such position upon the deenergization of electromagnet |10.

As previously described, cooperating with each of the bell crank levers|54 is a bell crank lever |21, |28, |29, |3|, and |32 which arepositioned in accordance with the position assumed by their respectivesensing ngers H0. yIf the sensing ringer ||0 is held depressed, whichwill be the position it assumes if a perforation is not alignedtherewith, the free end of its bell crank lever lies in the path of thehorizontal arm of its bell crank lever, such as |54. Thus, when therecess in cam |62 aligns with lug |6|, the bell crank lever such as |54is held against movement andthe contacts |58`|59 will be held open.However, if a sensing nger lllis allowed to ascend, which results fromthe presentation of a perforation in alignment therewith, its associatedbell crank lever such as |54 is released upon the presentation of therecess of cam |62 thereto, which results in the closure of contacts |56and |59.

As sleeve |65 rotates, the recesses in cam |62 are presentedsuccessively to the lugs |6I on the bell crank levers |54 and thecontacts |58 and |59 will be operated in a manner corresponding to theposition of the sensing ngers l0; that is, if the sensing fingers ||0sense a perforation in the tape 43, the associated bell crank levers |54will be operated for effecting the sequential closure of contacts |58and |59. 'Howeven if no perforation is sensed, then the contacts |58 and|59 will not be allowed to close but will be held open in the positionshown in Figi.

Also secured to sleeve |65 are cams |14 and |15. Cam |14 cooperates withrollerv |39 secured to an arm of bail |31 for operating the bailcyclically, as previously and to be subsequently described. Cam |15cooperates with roller |5| secured to one arm of bell crank lever |49and serves to operate stepping pawl |46 to engage the next succeedingtooth of ratchet wheel |44 and cause the corresponding rotation of pinwheel |45 and, in turn, the relative movement of tape 43.

The periphery of shoulder |66 is formed as a cam having a recess to beentered by a roller 8| carried by a spring biased arm |82 pivoted to theframe at |83. The purpose of the cam sur.- face on shoulder |66, andparticularly of the recess therein, in cooperation with roller |8|, isto prevent singing or chattering of the clutch comprising drivingportion |12 and driven portion |61 during periods of arrestment of thelatter, and to control the initial rotation of cam |62. Since spring |1|opposes the disengagement of driven clutch portion |61 from drivingportion |12, a slight torsional bias may be required to establish andmaintain a gapv between the clutch portions after bare disengagement hasoccurred, it being understood that disengagement and separation of theclutch portions results solely from rotation of clutch throwout camsurface |68 against stop member |69. Cooperation of roller |8.| with thedescending 'slope of the recess in the periphery of shoulder |66provides the desired torsional bias. Y

Control of the initial rotation of cam |62 is important because veryearly in a cycle of rotation it controls one of the bell cranks |54 toimpress upon the telegraph line the start impulse, the eiect of which isto set in operation any telegraph printer connected to the line. If cam|62 should be permitted to be rotated far enough to initiate the startimpulse before iirm engagement of the clutch portions is established,as, for example, by frictional engagement of the tips of the clutchteeth, distortion of some portion of the signal combination to betransmitted is likely to result, due to subsequent slipping of theclutch portions into rrn engagement and accompanying variation in thevelocity of cam |62. The immediate establishment of rm engagementbetween the clutch portions may be assuredby exerting upon the drivenclutch portion |61 a drag sufcient to resist rotation due to frictionalengagement between the teeth. The desired drag is furnished byengagement of roller |8| with the periphery of shoulder |66 andparticularly with the sharp ascending slope of the recess therein whichroller |8| encounters substantially immediately upon the tripping ofstop member |69.

Electromagnet |19 is controlled thro-ugh contact springs |18 and |19which are insulatedly mounted to a frame member. Contact spring |19carries at its free end an insulator arranged to be engaged by an arm|86 formed on the member |4| of the frame |06. When `the frames |05 and|06 are inthe position shown in Fig. 1 with the plates |08 and |99abutting pilates |4 and |6 of the perforator, arm |89, as shown in Fig.1, holds contact |19 free of contact |18. In-

stantly that frames |05 and |06 are moved clock-l spring |1| to movedriven portion |61 rearwardly,

as viewed in Fig.'3, or to the left as viewed in Fig. 4, to engage thedriving portion |12 of the positive clutch. Sleeve |65 and the camslsecured thereto are thereupon rotated.

Operation For the purpose of clarity, let it be assumed that all of thecharacters previously perforated in the tape 43 have been transmittedand that the sensing unit has been moved to a position where the plates|08 and |69 abut the plates i4 and i6 of the perforator. Under suchcircumstances, contacts |18 and |19 are opened and electromagnet |16 isdeenergized, which results in stoppage of sleeve |65. i

If, under such conditions,V the keyboard perforator is operated throughthe depression of its key levers, the permutation bars 66-65 will be setpermutably..` For each depression of a key lever, mechanism is operatedfor rend-ering clutch effective, whereupon power is communicated tosleeve 96, and in turn, to cam 91. The permutedsetting of thepermutation bars 64-65 causes a corresponding setting of inter- 75.

tol

sleeve 31 and pin 38 operates punch .39',

against the laction of spring 4| to perforate a fle-ed hole in tape 43.Operation of hammer |1 causes the movement of the punches I3 through theinterponents I8 which have been positioned to the right, as viewed inFig. 1, to perforate tape 43 with a transverse row of perforationssymbolic of the character identified with the depressed key lever whichcaused the setting of the permutation bars 64 and 65. As hammer I1 wasmoved vertically, stepping 'pawl 49 was brought into engagement with thenext succeeding tooth of ratchet portion 48. As cam 91 continues itsrotation, spring 6I becomes effective to restore hammer |1 and steppingpawl 49 to their normal positior or the position shown in Figs. l and 2.The downward movement of stepping pawl 49 causes pin drum 41 to rotatein a counterclockwise direction, as viewed in Fig. 2, and advance thetape 43 a distance determined by the distance between succeeding teethon ratchet 48.

The advancement of tape 43 causes the movement of frame |06 about itspivot a distance equal to the distance through which the tape isadvanced. Frame |05 remains in the position shown in Fig. 1, due to theaction of springs |I6 and |I1, in which case the sensing fingers IIO arein alignment with the transverse row of perforations inserted in tape 43as a result of the described depression of a key lever.

The movement of frame |06, asr described, causes arm |80 to move free ofcontact |19, whereupon contacts |10 and |19 are closed and a circuit forthe energization of electromagnet |10 is completed.

Electromagnet |10 withdraws, through its armature, latch |69 and freesthe shoulder on the cam surface |68 of the driven portion |61 of theclutch which slides into engagement with the driven portion |12 of theclutch. However, until the driven and driving portions of the clutch arefully engaged, rotation of sleeve |65 is prevented, due to thecooperation of roller |8| on the periphery of shoulder |66. However,when the driven and driving portions of the clutch are fully engaged,sleeve |65 rotates.

As sleeve |65 rotates, cams |62, |14, and |15 rotate. Through cam |14,bail |31 is moved to allow, under the tension of their individualsprings |34, the movement of the sensing fingers I0 and the tapegripping rod |25. Sensing fingers ||0 thus assume a position determinedby the perforations in the tape. The tape 43, through rod 25, will beheld against movement relative to frame |05 during the period thesensing ngers ||0 are sensing the perforations in tape 43 and thetransmission of the impulses indicative of their setting.

Also, as sleeve |65 rotates, `cam |62 identified with the start impulseis effective on the bell crank lever |54 to cause the opening ofcontacts- |58 and |59 for the transmission* of a start impulse.Significant, of course, is the fact that for each cycle of rotation ofsleeve |65, the bell crank lever |54 identiled with the start impulsewill be actuated invariably to cause the opening of 'its'contacts |58and' |59 to transmit the starting impulse. As sleeve |65 continues itsrotation, its cams |62 are presented sequentially to lugs |6| on vthebell crank levers |54 which,

as previously described, are released to close con' tacts |58 and |59,if a sensing finger I0 finds a perforation in the tape 43. If thesensing nger I I0 fails to iind a perforation in tape '43, then bellcrank lever |54, through the bell crank lever individual to thatparticular sensing finger, will be restrained against movement and willnot close contacts and |59. `Through the `rotation of sleeve |65, theimpulses identified with the particular transverse row of perforationswill be transmitted.

During the transmission of the impulses through the operation ofcontacts |58 and |59, cam |15 is effective for causing the operation ofstepping pawl |46. Stepping pawl |46 is moved positively upwardly by cam|15 to engage the next succeeding tooth on the ratchet wheel |44 when itis moved downwardly by a spring |84 to rotate pink wheel |45. However,at that instant, rod |25 has been moved upwardly and engaged tape 434tohold it against movement. Under such a condition, the tape 43 beingheld against movement,- frame |06 will be rotated in a clockwisedirection about its pivot, as viewed in Fig. 1, to approach frame |05.

After the last of the several bell crank levers |54 has been subjectedto the action of the last of the cams |62, cam |14 operates bail |31 torotate bell crank levers |21-I32 in a clockwise direction, as viewed inFig. l, to withdraw the sensing ngers ||0 and the tape gripping rod If,during the cycle of rotation of shaft |63 just described there has beenno further operation of the key levers 62, the frame |05 remains in-abutting relation with the plates I4 and I6. However, if, during thecycleof rotation of shaft |63 another key lever 62 or other key levers62 have been depressed, tape 43 will be advanced through the operationof pin drum 41, in which case the tape will be pulled by the action ofpin wheel |45 through the frame |05 and the transv-erse rows ofperforations in the tape 43 will be sensed successively and the impulsesindicative thereof will bev transmitted upon the rotation of sleeve |65.y

If the keyboard periorator is operated at a speed considerably fasterthan the speed of operation of sleeve |65, the frames |05 and |06 willbe rotated to the position shown in Fig. 2 when a loop of tape, asshownin Fig. `2, will form between the frame |05v and the plates |4 and I6 ofthe perforator. As the pin wheel |45 rotates, the tape 43 will bepresented to the tape sensing fingers ||0.

If there is a prolonged cessation in the opera-- 43. During suchmovement, the successive rowsl of perforations will be sensed and theimpulses`v indicative thereof will be transmitted through the rotationof sleeve |65. y

If, during the aforementioned movement of frames |05 and |06 inclockwise direction there is no operation-of the perforator, themovement of the frames |05 and |06 continues until frame abuts theplates I4 and I6 of the perforator. When in such position, the last rowof perforations in tape 43 will be sensed and the impulses identiedtherewith will be transmitted. Also, arm |89 Will have engaged Contact|19 to open contacts |18 and |16 to deenergize electromagnet |10.Electromagnet |18, upon being deenergized, restores the stop latch inthe path of cam surface |68 which, upon being engaged, forces drivenportion |51 against the tension of spring |1| to the right, as viewed inFig. 4, whereupon a disengagement between the driven and drivingportions of the clutch occurs and sleeve |55 is thus stopped.

Upon a resumption in the operation of the perforator, contacts |18 and|19 are closed and electromagnet |18 is energized, with the result thatsleeve |65 rotates for continuing the operation as previously described.

M odi fication According to the modification shown in Fig. 7, thesensing unit has but a single frame |81 pivotedon pivots |88. As shown,frame |81 normally abuts the plates I6 and I4 of the perforator which,in every respect, is similar to the perforator previously described.

Included in the frame |81 are the sensing fingers |89, pin wheel |58,and feed pawl ISI which cooperates with a ratchet wheel secured to theshaft on which pin wheel is fastened and which cooperates with a cam oncam sleeve |65 to rotate the pin wheel |90 and advance the tape inengagement therewith. The cam which operates pawl |9| is positioned withrespect to the other cams on sleeve |55 such that it is effectiveimmediately following the release of the cam sleeve |65.

The sensing iingers |89 serve to control the position of bell cranklevers and, in turn, the actuation of contact controllers in a mannersimilar to that previously described for the sensing ngers |||l.

When the tape is advanced from the perforator, the frame |81 is pushedto the left, as viewed in Fig. 7, about its pivot shaft |88 and, due tothe rotation of projection |88, contacts |19 and |18 are closed forcompleting an energizing circuit for electromagnet |18 to release thetransmitting cam sleeve |85. the movement of pawl |9| to engage the nextsucceeding tooth on rthe ratchet wheel secured to the shaft carrying pinwheel |98 to cause its step-by-step advancement. Such advancement occursduring the start interval of the transmitting cam shaft and prior to thetransmission of the rst impulse of the code combination of impulses.Rotation of pin wheel |90 causes they framev |81 to rotate about itspivot |88 in a clockwise direction; moving it in abutting relation tothe plates I4 and I6 of the perforator to sense the transverse row ofperforations therein.

As the transmitting cam sleeve |65 rotates, the contact controllers |51will be operated for operating their associated contacts and thetransmission of signals indicative of the position of the sensingfingers |89.

If the perforator is operated at a speed higher than the speed ofrotation of the transmitting cam shaft, then the frame |81l will bemoved about its pivot in a counterclockwise direction until a stop |93is engaged, when the movement of the frame will be arrested and a loopof tape will be formed.

As sleeve |55 rotates, it causes If there is a cessation in theoperation of the perforator, the tape will be drawn step by step, due tothe cyclic operation of pin Wheel |90 past the sensing fingers |89 untilthe. tape between the sensing unit and the perforator becomes taut. Whensuch a condition prevails, the pin wheel |90 will be rotated aspreviously described and will effect the 4step-by-step advancement ofthe frame |81 along the tape and toward the tape eXit channel of theperforator to sense the last transverse row of perforations and to abutthe plates M and l5. Contacts |18 and |19 will be opened, electromagnet|10 will be deenergized, and camsleeve |55 will bearrested.

While the invention has been disclosed and described with reference to aparticular type of apparatus, it is obvious that it may be applied toother forms of apparatus without departing from the spirit and scope ofthe present invention.

What is claimed is:

1. In combination with apparatus for applying an unlimited number ofpermanent indicia on a record strip, apparatus in juxtaposition withsaidv indicia applying apparatus for sensing the indicia including aplurality of sensing elements cooperating with the indicia, meansresponsive to said elements, Aa plurality of` electrical contacts, meansfor operating said contacts sequentially as determined by the operationof said means through said sensing elements, and `means to advance thestrip to bring successive indicia in alignment with said sensingelements and for advancing said sensing elements along said strip to apoint immediately adjacent the point of application of said indicia whena predetermined condition prevails in said strip.

2. In combination with apparatus for applying an unlimited number ofpermanent indicia on a record strip, apparatus in juxtaposition withsaid indicia applying apparatus for sensing the indicia including aplurality o f sensing elements cooperating with the indicia, meansresponsive to said elements, a plurality of electrical contacts, arotary cam effective through the control of said sensing elements foroperating said contacts sequentially as determined by the operation ofsaid means through said sensing elements, and means to advance the stripto bring successive indicia in alignment with said sensing elements andfor advancing said sensing elements along said strip to a pointimmediately adjacent the point of application-of said indicia when apredetermined condition prevails in said strip.

3. In combination with apparatus for applying an unlimited number ofpermanent indicia cna record strip, .apparatus in juxtaposition withsaid indicia applying apparatus for sensing the indicia including aplurality of sensing elements cooperating with the indicia, meansindividual to each of the sensing elements and set in accordance withtheposition assumedv by its element corresponding to the indicia, aplurality of yelectrical contacts, a member individual to each contactand operatively related to a sensing element lthrough said individualmeans, rotary means for operating said members to control the operationof said electrical contacts in accordance'with the setting of saidsensing elements, and means to advance the strip to bring successiveindicia in alignment with said sensing elements and for advancing saidsensing elements along said Astrip to a point immediately adjacent thepoint of application of said indicia when a predetermined conditionprevails in said strip.

wtf i 4. In combination with apparatus for applying 7|`f an unlimitednumber of permanent indicia Von a record strip, apparatus injuxtaposition with said indicia applying apparatus for sensing theindicia including a plurality of sensing elements, a bell crank leverindividual to each sensing element, a plurality of contacts, a memberindividual to each contact and each of said bell crank levers, motordriven means operative to control the operation of said members and inturn said l0. contacts in accordance with the position assumed by saidbell crank levers as determined by said sensing elements, and means toadvance the strip to bring successive indicia in alignment with saidsensing elements and for advancing said sensing l elements along saidstrip to a point immediately adjacent the point of application of saidindicia when a predetermined condition prevails in said strip.

5. In combination with apparatus for applying an unlimited number ofpermanent indicia on a record strip, a sensing unit in juxtapositionwith said indicia applying apparatus including a plurality of sensingelements cooperating with the indicia, strip advancing means associatedwith 2? said sensing elements, means responsive to said elements, aplurality of electrical contacts, motor driven means for operating saidcontacts se said indicia when a predetermined condition prevails in saidstrip.

6. In combination With a strip perforator including code punches and afeed hole punch, u means for controlling the effectiveness of saidpunches, means for operating said code punches in accordance with theoperation of said means and said feed hole punch to perforate a stripWith transverse rows of perforations and feed ,M54 said strip, apparatusin juxtaposition with saidstrip perforator for sensing the codeperforations in said strip including a plurality of sensing fingers, aplurality of electrical contacts through which impulses characteristicof the perforations 5g).- are transmitted, means for operating saidcontacts sequentially in accordance with the position assumed by saidsensing lingers as determined by the perforations'in said strip, andmeans cooperating with the feed holes in said strip for moving 55. saidsensing fingers along the strip to a point to "sense thelast row ofperforations therein.

7. In combination with astrip perforator including code punches and afeed hole punch, means for controlling the eifectiveness of saidpunches, means for operating said code punches in accordance with theoperation of said means and said feed hole punch to perforate a stripwith transverse rows of perforations and feed said strip, apparatus injuxtaposition with said strip perforator for sensing the codeperforations in said strip including a plurality of senslng fingersmovable longitudinally of the strip, a plurality of electrical contactsthrough which impulses characteristic of the perforations areIgtransmitted means for operating said contacts sequentially inaccordance with the position assinned by said sensing fingers asdetermined by the perforations in said strip, and means cooperating Withthe feed holes in said strip for mov- 15x. ing said strip to bringsuccessive transverse rows of perforations in alignment with saidsensing lingers and for moving said sensing fingers along the strip to apoint to sense the last row of .perforations therein when apredetermined condition prevails in said strip.

8. In combination with a strip perforator including record punches and afeed hole punch, means for controlling the effectiveness of said codepunches, means for operating said code punches in accordance with theoperation of said means and said feed hole punch to perforate a stripwith transverse rows of perforations and feed said strip, apparatus injuxtaposition with said strip perforator for sensing the codeperforations in the strip including a plurality of sensing lingers, aplurality of electrical contacts, means set in accordance with thepositions assumed by said sensing lingers corresponding to theperforations in said strip, means for operating said contactsmechanically as determined by the operation of said means by thepositions of said sensing fingers, and strip advancing means in saidsensing apparatus operative cyclically either to advance the strip tobring successive indicia into alignment with said sensing lingers or toadvance said sensing fingers along said strip to a point to sense thelast row of perforations therein. Y

9. In combination with a perforator for applying code perforations andfeed perforations in a strip, a unit in juxtaposition with saidperforator including a movable frame,l sensing ngers in said frame forsensing code perforations, feed mechanism in said frame cooperating withthe feed perforations for advancing the strip, a pivoted lever securedto each of said fingers and responsive to their position, a plurality ofelec-` trical contacts, and a rotary distributorl operative upon themovement of said frame to operate said contacts in accordance with theposition of said levers. l n

10.` In combination with a perforator for applying code perforations andfeed perforations in a strip, a unit in juxtaposition with saidperforator including a movable frame, sensing fingers in said frame forsensing code perforations, feed mechanism in said frame cooperating withthe feed perforations for advancing the strip, a pivoted lever securedto each of said lingers and responsive to their position, a plurality ofelectrical contacts, a rotary distributor including means to operatesaid feed mechanism and to actuate said contacts in accordance with theposition of said l levers, and means actuated upon the movement of saidframe for releasing said distributor.

11. In combination with a perforator for applying code perforations andfeed perforations in a strip, a unit in juxtaposition with saidperforator including a movable frame, sensing lingers in said frame forsensing code perforations, feed mechanism in said frame cooperating withthe feed perforations for advancing the strip, a pivoted lever securedto each of said fingers and responsive to their position, a plurality ofelectrical contacts, a rotary distributor including means to operatesaid feed mechanism during a portion of the cycle of said distributorand to actuate said contacts during another portion of the cycle of saiddistributor in accordance with the position of said levers, and meansactuated upon the movement of said frame for releasing saidldistributor.

1,2. In combination with a perforator for applying code perforations andfeed perforations in a strip, a unit in juxtaposition with said perfora-2 a pivoted lever secured to each of said fingers and responsive to"their position, aplurality of electrical contacts,` anda :rotarydistributor operative when said frame is rotated on its pivot includingmeans to operate said feed mechanism and to actuate said contacts inaccordance with the position of said levers.

13. In combination with a perforator for applying code perforations andfeed perforations in a strip, a unit in juxtaposition with saidperforator including a movable frame, sensing fingers in said frame forsensing code perforations, feed mechanism in said frame cooperating withthe feed perforations for advancing the strip, a pivoted lever securedto each of said fingers and responsive to their position, a plurality ofcontacts, a rotary distributor, and means responsive to the movement ofsaid frame for releasing said distributor to operate said contacts inaccordance with the position of said levers.

14. In combination with a perforator for applying code perforations andfeed perforations in a strip, a unit in juxtaposition with saidperforator including a movable frame, sensing fingers in said frame forsensing code perforations, feed mechanism in said frame cooperating withthe feed perforations for feeding the strip past said sensing fingers,signal transmitting means, means for operating said transmitting meansin accordance With the setting of said fingers, means for operating saidfeed mechanism, means actuated by said transmitting operating means foroperating said feed operating mechanism at the beginning of its cycle,and means actuated upon the movement of said frame for releasing saiddistributor.

15. In combination with a perforator for applying code perforations andfeed hole perforations in a strip, a unit in juxtaposition with saidperforator including a plurality of sensing fingers for sensing the codeperforations, feeding mechanism cooperating with the feed perforationsfor advancing the strip or the unit, a number of pairs of springcontacts, a corresponding set of controllers therefor, a rotary cammember cooperating with said controllers and normally holding said pairof contacts open and having portions for permitting the shift of saidcontactors and the closing of said pairs of contacts in order and atspaced intervals, a stop for arresting said cam member in normalposition, means for releasing said stop in advance of the operation ofsaid sensing fingers, and means operated upon the advancement of thetape from the perforator for operating said stop releasing means.

16. In combination with a perforator for applying code perforations andfeed perforations in a strip, a unit in juxtaposition with saidperforator including a plurality of sensing ngers for sensing the codeperforations, feeding mechanism cooperating with the feed perforationsfor advancing the strip or the unit, a number of pairs of springcontacts, a corresponding set of controllers therefor, a rotary cammember cooperating with said controllers and normally holding said pairof contacts open and having portions for permitting the shift of saidcontrollers and the closing of said pairs of contacts in order and atspaced intervals, members intermediate said sensing fingers andcontrollers operative by said sensing fingers for controlling theposition of said controllers during the rotation of said cammemberandthus theoperationf-of said cont,acts;;and' j means on the cammember forv operating j said' feeding mechanism either to'advance the`strip through said sensing unit or advance the sensing unit alongsaidstrip;

1'7. In combination with a. perforator forap.-

plying code perforations and feed hole perforations in a. strip, a unitin juxtaposition With said pelforator `including'a pluralityzof sensingfingers for sensing the code perforations, feeding mechanism cooperatingwith the feed perforations for advancing the strip or the unit, a numberof pairs of spring contacts, a corresponding set of controllerstherefor, a rotary cam member cooperating with said controllers andnormally holding said pair of contacts open and having portions forpermitting the shift of said contacts and the closing of said pairs ofcon- -tacts in o-rder and at spaced intervals, members intermediate saidsensing fingers and said controllers operated by said sensing fingers tocontrol the operation of said controllers upon the rotation of said cammember, and means for operating said members cyclically to allow theoperation of said feeding mechanism.

18. In combination with a perforator for applying code perforations andfeed hole perforations in a strip, a unit in juxtaposition with saidperforato-r including a plurality of sensing fingers for sensing thecode perforations, feeding mechanism cooperating with the feedperforations for advancing the strip or the unit, a number of pairs ofspring contacts, a corresponding set of controllers therefor, a rotarycam member cooperating with said controllers and normally holding saidpair of contacts open and having portions for permitting the shift ofsaid contacts and the closing of said pairs of contacts in order and atspaced intervals, members intermediate said sensing fingers and saidcontrollers operated by said sensing fingers to control the operation ofsaid controllers upon the rotation of said cam member, and meansoperated cyclically for withdrawing said sensing fingers from. sensingrelation 'with said strip,

19. In combination with a perforator for applying code perforations andfeed hole perforations in a strip, a unit in juxtaposition with saidperforator including a plurality of sensing fingers for sensing the codeperforations, feeding mechanism cooperating with the feed perforationsfor advancing the strip or the unit, a number of pairs of springcontacts, a corresponding set of controllers therefor, a rotary cammember cooperating with said controllers and normally holding said Vpairof contacts open and having portions for permitting the shift of saidcontacts and the closing of said pairs of contacts in order and atspaced intervals, members intermediate said sensing fingers and saidcontrollers operated by said sensing fingers to control the operation ofsaid controllers upon the rotation of said cam member, a bail foroperating said intermediate members, and means on said cam member foroperating said bail whereby said members are operated cyclically.

20. A telegraph transmitter for transmitting signal impulses from acontrol strip having rows of signal indicia. including means for sensingthe indicia, circuit control means, and means for operating said controlmeans successively in accordance with the operation of said indiciasensing means, and means to advance the strip to bring successiveindicia in alignment with said sensing means and for advancing saidsensing means along said strip to a. point opposite the last indicia insaid strip when a predetermined lcondition prevails in said strip.

21. A telegraph transmitter for transmitting signal impulses from acontrol strip having rows of signal indicia including means for sensingthe indicia, circuit control means, a rotary distributor effectivethrough the control of said sensing means for operating said circuitcontrol means sequentially as determined by the operation of saidsensing means, and means to advance the strip to bring successiveindicia in alignment with said sensing means and for advancing saidsensing means along said strip to a, point opposite the last row ofsignal indicia When a predetermined condition prevails in said strip.

ALBERT H. REIBER.

